Elementblocks

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Across
  1. 8. Most abundant element in the atmosphere
  2. 10. Dancing Queen
  3. 11. Hierro
  4. 14. Can be used to stabilise a person's mood
  5. 16. 30
  6. 18. Most widespread metal on Earth
  7. 19. Lightest halogen
  8. 20. 8
  9. 21. Glows reddish-orange in a vacuum discharge tube
Down
  1. 1. Named for a Greek word meaning 'hidden.'
  2. 2. First discovered noble gas
  3. 3. Most common element in the world
  4. 4. Kalyy
  5. 5. Na
  6. 6. Stibium
  7. 7. Brittle solid coloured pale yellow
  8. 9. Lightest noble gas
  9. 12. #1
  10. 13. Aggie
  11. 15. Named for the Greek word for 'strange;foreign.'
  12. 17. Radioactive noble gas